5.2km距离无线激光通信跟踪实验

5.2km distance wireless laser communication tracking experiment

摘要:

为了实现对远距离通信下，湍流大气中传输时光束的跟踪，设计了光斑跟踪系统。对该系统的硬件结构、工作原理、系统跟踪控制算法及光斑图像处理算法进行了研究，首先，根据系统硬件构成及控制算法实用性，选择采用PI算法作为系统的跟踪控制算法，接着，为了提高在光斑图像处理方面算法的运算速度，选择采用改进的中值滤波算法来对系统所采集到的光斑图像进行处理，然后，在阈值分割方面，为了获取更加精确的光斑灰度图像，系统采用迭代法来选择阈值，进而对图像进行阈值分割，最后，采用该系统进行了5.2km的光斑跟踪实验，并对实验结果进行分析。实验结果表明，本系统可以有效的对湍流大气中的光斑进行跟踪，跟踪精度可达5.4，基本符合空间激光通信系统对跟踪系统的要求。

Abstract:

For the problem of laser spot detection in the turbulent atmosphere in the case of Long distance communication，a laser spot tracking system is designed，The system's hardware structure, working principle，system tracking control algorithm and optical spot image processing algorithm are studied.First，according to the system hardware structure and the practicability of the control algorithm，the PI algorithm is selected as the tracking control algorithm of the system.Then, in order to improve the speed of algorithm in the spot image processing，we choose the improved median filter algorithm to process the spot image collected by the system.Then, in terms of threshold segmentation, in order to get more accurate grayscale images，the system uses iterative method to select the threshold, and then thresholds the image.finally，the laser spot tracking experiment of 5.2km is carried out with this system，and the results of the experiment are analyzed，the experimental results show that shows that the system can track the light spot steadily，and the tracking precision can reach 5.4,it meets the requirements of the space laser communication system for the tracking system.